General relation between tensile strength and fatigue strength of metallic materials

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	General relation between tensile strength and fatigue strength of metallic materials
	J. C. Pang; S. X. Li; Z. G. Wang; Z. F. Zhang
	2013
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	564 页码:331-341
摘要	With the development of high-strength materials, the existing fatigue strength formulae cannot satisfactorily describe the relation between fatigue strength sigma(w) and tensile strength sigma(b) of metallic materials with a wide range of strength. For a simple but more precise prediction, the tensile and fatigue properties of SAE 4340 steel with the tensile strengths ranging from 1290 MPa to 2130 MPa obtained in virtue of different tempering temperatures were studied in this paper. Based on the experimental results of SAE 4340 steel and numerous other data available (conventional and newly developed materials), through introducing a sensitive factor of defects P, a new universal fatigue strength formula sigma(w)=sigma(b)(C-P.sigma(b)) was established for the first time. Combining the variation tendency of fatigue crack initiation sites and the competition of defects, the fatigue damage mechanisms associated with different tensile strengths and cracking sites are explained well. The decrease in the fatigue strength at high-strength level can be explained by fracture mechanics and attributed to the transition of fatigue cracking sites from surface to the inner inclusions, resulting in the maximum fatigue strength sigma(max)(w) at an appropriate tensile strength level. Therefore, the universal fatigue strength formula cannot only explain why many metallic materials with excessively high strength do not display high fatigue strength, but also provide a new clue for designing the materials or eliminating the processing defects of the materials. (c) 2012 Elsevier B.V. All rights reserved.
部门归属	[pang, j. c. ; li, s. x. ; wang, z. g. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; zhang, zf (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; zhfzhang@imr.ac.cn
关键词	High-strength Materials Tensile Strength Fatigue Strength Fatigue Crack Initiation Site Fatigue Damage Mechanism High-cycle Fatigue Severe Plastic-deformation Inclusion Size Bearing Steel Ultrahigh Strength Gigacycle Fatigue Carbon-steels Behavior Regime Cu
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71423
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. C. Pang,S. X. Li,Z. G. Wang,et al. General relation between tensile strength and fatigue strength of metallic materials[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2013,564:331-341.
APA	J. C. Pang,S. X. Li,Z. G. Wang,&Z. F. Zhang.(2013).General relation between tensile strength and fatigue strength of metallic materials.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,564,331-341.
MLA	J. C. Pang,et al."General relation between tensile strength and fatigue strength of metallic materials".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 564(2013):331-341.